Abstract: Based on the model for the model-change version of a SUV and by using mesh morphing technology and CFD software, the effects of exterior styling surfaces on aerodynamic drag are analyzed. On this basis, the key exterior styling surfaces and aerodynamic accessories having greater influences on aerodynamic drag are optimized successively. As a result, the aerodynamic drag coefficient of the model lowers from original 0.407 down to 0.347 and its measured value is 0.34 by wind tunnel test, with a simulation error of only 2.06%

Key words: aerodynamic drag, meshing morphing technology, CFD Analysis, exterior styling surface optimization, aerodynamic accessory optimization